Hearthpwn

This deck is just a classic cube-style demon warlock deck (although this version doesn't have cube in it, hence the name "Demon Warlock" instead, but I love the infinite value potential so I cut a few of the better defensive cards and slotted in a Shriek, 2x Expired Merchant, and 2x Soulwarden. Basically, make sure you discard one or both of N'Zoth and Gul'Dan, and then manipulate your Soulwarden to be your lowest cost card in hand and cast Shriek. Then your next Soulwarden will give you another Soulwarden and N'Zoth or Gul'Dan or both and it'll be an infinite cycle of N'Zoth's and Gul'Dans. Also, your Prime minion and your Prime Shuffling minion will help you stave off fatigue, as you can continually get them resummoned from both N'Zoth and Gul'Dan.